/*
 * Copyright 2019 WeBank
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.webank.wedatasphere.linkis.enginemanager.process

import java.security.PrivilegedExceptionAction

import com.webank.wedatasphere.linkis.common.conf.DWCArgumentsParser
import com.webank.wedatasphere.linkis.common.utils.Utils
import com.webank.wedatasphere.linkis.hadoop.common.utils.HDFSUtils
import org.apache.commons.lang.StringUtils
import org.apache.hadoop.yarn.api.records.ApplicationId
import org.apache.hadoop.yarn.client.api.YarnClient
import org.apache.hadoop.yarn.conf.YarnConfiguration

/**
  * Created by allenlliu on 2019/2/22.
  */
class SparkCommonProcessEngine(override val processBuilder: ProcessEngineBuilder,
                                override val dwcArgumentsParser: DWCArgumentsParser,
                                override val timeout: Long) extends CommonProcessEngine(processBuilder,dwcArgumentsParser,timeout)
{
  def this(processBuilder: ProcessEngineBuilder, dwcArgumentsParser: DWCArgumentsParser)=this(processBuilder, dwcArgumentsParser, -1)
  private var yarnAppId: String = _

  override def dealStartupLog(line: String): Unit = {
    println(getPort + ": " + line)
    if(StringUtils.isEmpty(yarnAppId)) {
      if (line.contains("application_")) {
        val appIdStr = line.split("\\s+").filter(x => x.startsWith("application_")).toList
        if (appIdStr.size > 0) {
          yarnAppId = appIdStr(0)
          logger.info("Get yarn application id is "+ yarnAppId)
        }
      }
    }
  }

  override def shutdown(): Unit = {
    if (StringUtils.isNotEmpty(yarnAppId)) {
      logger.info(s"try to kill yarn app with id($yarnAppId).")
      Utils.tryQuietly {
        val yarnConf = new YarnConfiguration()
        HDFSUtils.fillConfiguration(yarnConf)
        HDFSUtils.getUserGroupInformation.doAs(new PrivilegedExceptionAction[Unit] {
          def run: Unit = {
            val yarnClient = YarnClient.createYarnClient()
            yarnClient.init(yarnConf)
            yarnClient.start()
            logger.info("Yarn 客户端初始化完成")
            val strings = yarnAppId.split("_")
            yarnClient.killApplication(ApplicationId.newInstance(strings(1).toLong,strings(2).toInt))
          }
        })
      }
      super.shutdown()
    }
  }

}
